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Introduction

Hydrostatics Servicing Overview................................................................................................................................................ 5

General Servicing Instructions.....................................................................................................................................................5

Safety Precautions............................................................................................................................................................................6

Symbols used in Danfoss literature............................................................................................................................................7

General description of H1 family hydrostatic pumps..........................................................................................................7

Design...................................................................................................................................................................................................8

H1 Single Pumps Closed Circuit Pictorial Diagram............................................................................................................10

H1 system schematic.................................................................................................................................................................... 10

Operation

Pressure Limiter Valves................................................................................................................................................................ 12

Pressure Limiter Sectional View.......................................................................................................................................... 12

High Pressure Relief Valve (HPRV) and Charge Check Valve.......................................................................................... 12

HPRV/Charge Check Valve Sectional View...................................................................................................................... 13

Charge Pressure Relief Valve (CPRV)....................................................................................................................................... 13

Bypass Function..............................................................................................................................................................................13

System Schematic for Single Pump................................................................................................................................... 14

Electrical Displacement Control (EDC)................................................................................................................................... 14

EDC Operation........................................................................................................................................................................... 15

Manual Override (MOR)............................................................................................................................................................... 16

Manual Displacement Control (MDC) ....................................................................................................................................16

MDC Operation..........................................................................................................................................................................17

MDC Torque................................................................................................................................................................................18

Neutral Start Switch (NSS)..................................................................................................................................................... 18

Case Gauge Port M14..............................................................................................................................................................18

Operating Parameters

Input Speed......................................................................................................................................................................................19

System Pressure..............................................................................................................................................................................19

Servo Pressure.................................................................................................................................................................................20

Charge Pressure..............................................................................................................................................................................20

Charge Pump Inlet Pressure.......................................................................................................................................................20

Case Pressure...................................................................................................................................................................................20

External Shaft Seal Pressure....................................................................................................................................................... 21

Temperature.................................................................................................................................................................................... 21

Viscosity.............................................................................................................................................................................................21

Technical Specifications

H1 Pumps General Specification.............................................................................................................................................. 22

H1P 069—280 Physical Properties...........................................................................................................................................22

Fluid Specification......................................................................................................................................................................... 23

Fluid and Filter Maintenance Recommendations

Filtration System.............................................................................................................................................................................24

Pressure Measurements

Port Locations and Gauge Installation................................................................................................................................... 26

H1P Ports Information.............................................................................................................................................................26

Initial Startup Procedures

Unintended Machine Movement.............................................................................................................................................28

Start-Up Procedure........................................................................................................................................................................28

Troubleshooting

High Inlet Vacuum......................................................................................................................................................................... 30

Unintended Machine Movement....................................................................................................................................... 30

Fluid Under Pressure............................................................................................................................................................... 30

Electrical Troubleshooting..........................................................................................................................................................30

Integral Filter Bypass.....................................................................................................................................................................30

Neutral Difficult or Impossible to Find................................................................................................................................... 31

Transmission Operates Normally in One Direction Only.................................................................................................31

Service Manual

H1P 069—H1P 280 Axial Piston Single Pumps

Contents

 

©

 Danfoss | January 2021

AX152886482551en-000601 | 3

Содержание H1P 069

Страница 1: ...Service Manual H1P 069 H1P 280 Axial Piston Single Pumps www danfoss com...

Страница 2: ...87 to AX152886482551 and removed pressure limiter screens 0504 January 2020 Corrected the A B port size for 115 130 frame 0402 December 2018 Major clean up revision 0401 July 2008 May 2018 Various cha...

Страница 3: ...Port M14 18 Operating Parameters Input Speed 19 System Pressure 19 Servo Pressure 20 Charge Pressure 20 Charge Pump Inlet Pressure 20 Case Pressure 20 External Shaft Seal Pressure 21 Temperature 21 V...

Страница 4: ...lenoids Repair 45 MDC Control Repair 46 Angle sensor on EDC Repair 49 EDC with Angle Sensor Repair 50 Automotive Control Repair 51 Shaft Seal and Bearing Repair 55 External Filter Repair 57 Filter Byp...

Страница 5: ...eneral procedures when repairing this product Icon Description Instructions Remove the unit If necessary remove the unit from the vehicle machine Chock the wheels on the vehicle or lock the mechanism...

Страница 6: ...ponents and void the manufacturer s warranty Take precautions to ensure system cleanliness when removing and installing system lines Fluid Under Pressure Escaping hydraulic fluid under pressure can ha...

Страница 7: ...xplains its purpose General description of H1 family hydrostatic pumps The H1 family of closed circuit variable displacement axial piston pumps is designed for use with all existing Danfoss hydraulic...

Страница 8: ...ball joint The block spring ball guide and slipper retainer hold the slippers to the swashplate The reciprocating movement of the pistons occurs as the slippers slide against the inclined swashplate d...

Страница 9: ...ion of the pump swashplate determines which line is high pressure as well as the direction of fluid flow Case Drain and Heat Exchanger The pump and motor require case drain lines to remove hot fluid f...

Страница 10: ...ent Motor System Pressure Servo Pressure Charge Low Loop Pressure Suction Case Drain System Return Charge Filter Charge Pump Reservoir Heat Exchanger Bypass Valve Displacement Control Heat Exchanger C...

Страница 11: ...cement pump with electric proportional displacement control EDC and an H1 bent axis variable displacement motor with electric proportional control L and integrated loop flushing device Service Manual...

Страница 12: ...direction necessary to regulate the system pressure including into stroke overrunning or over center winch payout The pressure limiter is optional on H1 pumps except H1T 045 053 tandem pumps Pressure...

Страница 13: ...re at a designated level above case pressure This level is nominally set with the pump running at 1800 min 1 rpm and with a fluid viscosity of 32 mm s 150 SUS In forward or reverse charge pressure wil...

Страница 14: ...ines which line is high pressure as well as the direction of fluid flow Electrical Displacement Control EDC An EDC is a displacement flow control Pump swash plate position is proportional to the input...

Страница 15: ...operating loop change with load the control assembly and servo swashplate system work constantly to maintain the commanded position of the swashplate The EDC incorporates a positive neutral deadband a...

Страница 16: ...ground The vehicle or device must always be in a safe condition when using the MOR function Refer to control flow table for the relationship of solenoid to direction of flow Manual Displacement Contr...

Страница 17: ...is is required to take the backlash out of the mechanical connections between the Bowden cable and the control C Caution High case pressure may cause excessive wear and the NSS to indicate that the co...

Страница 18: ...provides a signal of whether the control is in neutral The signal in neutral is Normally Closed NC Neutral Start Switch schematic P005 702 M14 M5 M4 M3 Neutral Start Switch data Max continuous current...

Страница 19: ...em pressure is the differential pressure between high pressure system ports It is the dominant operating variable affecting hydraulic unit life High system pressure which results from high load reduce...

Страница 20: ...te angle and may be higher than the minimum charge pressure shown in the Operating parameters tables Maximum charge pressure is the highest charge pressure allowed by the charge relief adjustment and...

Страница 21: ...mperature is based on material properties and should never be exceeded Cold oil will generally not affect the durability of the transmission components but it may affect the ability of oil to flow and...

Страница 22: ...ting Parameters Please verify mating pump shaft seal capability H1P 069 280 Physical Properties Frame size 069 078 089 100 115 130 147 165 210 250 280 Oil volume 2 0 l 0 5 US gal 3 0 l 0 8 US gal 7 2...

Страница 23: ...exceeding 2 of duty cycle based load life Temperature Minimum 1 40 C 40 F Rated 104 C 220 F Recommended range2 60 85 C 140 185 F Maximum Intermittent 115 C 240 F 1 Cold start Short term t 3 min p 50 b...

Страница 24: ...Fluids and Lubricants BC0000093 Filtration System To prevent premature wear ensure only clean fluid enters the hydrostatic transmission circuit A filter capable of controlling the fluid cleanliness to...

Страница 25: ...r of particles greater than a given diameter x in microns upstream of the filter to the number of these particles downstream of the filter Filtration cleanliness level and x ratio recommended minimum...

Страница 26: ...protect gauges The drawing and following table show the port locations and gauge sizes needed Port locations M6 MB MA M3 M5 L3 L1 L2 System Port B M4 S System Port A L4 G302 L2 D065 P106033 H1P Ports...

Страница 27: ...165 210 250 280 L1 L3 Wrench 7 8 14 UNF 2B 3 8 internal hex 1 1 16 12 UNF 2B 9 16 internal hex 1 1 16 12 UNF 2B 9 16 internal hex 1 1 16 12 UNF 2B 9 16 internal hex L2 L4 Wrench 1 1 16 12 UNF 2B 9 16...

Страница 28: ...type and viscosity fill inlet line from reservoir to pump Use a 10 micron filler filter 6 Disconnect the pump from all control input signals Do not disconnect a FDC control from control input signals...

Страница 29: ...al operating speed and carefully check for forward and reverse control operation 18 Continue to cycle between forward and reverse for at least five minutes to bleed all air and flush system contaminan...

Страница 30: ...void prolonged contact with hydraulic fluid Always dispose of used hydraulic fluid according to state and federal environmental regulations Electrical Troubleshooting Electrical troubleshooting Item D...

Страница 31: ...rectly Servo pressure low or decaying Damaged servo seals may prevent servo piston from stroking the pump Check for torn missing servo seals Replace and retest Only a Danfoss Authorized Service Center...

Страница 32: ...eplace the charge pump System pressure Low system pressure does not provide enough power to move load Measure system pressure Continue to next step High pressure relief or pressure limiter valves Defe...

Страница 33: ...rom system Contaminated control orifices Control orifices are plugged Clean control orifices Contaminated control screens EDC supply screen is plugged Replace control screens Only a Danfoss Authorized...

Страница 34: ...ss when removing and installing system lines Charge Pressure Relief Valve Adjustments Operate the system with the pump in neutral zero displacement when measuring charge pressure This procedure explai...

Страница 35: ...ustment W Warning Pumps with only HPRV valves no longer contain pressure limiter screens and retainers To convert such pumps to those with pressure limiter valves please contact your Danfoss service p...

Страница 36: ...ate at normal speed 4 Use a 14 mm wrench for H1P 69 100 or a 17 mm wrench for H1P 115 250 to loosen the locking nut L024 5 Activate the control input until pressure in the high side of the system loop...

Страница 37: ...table for torque values HPRV Wrench Size and Torque Value Frame size Wrench size Torque 045 100 22 mm 70 N m 52 lbf ft 115 280 30 mm 110 N m 81 lbf ft If machine is towable with HPRVs opened three tur...

Страница 38: ...g hold the adjusting screw while torquing the locknut to the value in the table below Displacement Limiter Adjustment Data Frame 069 078 089 100 115 130 147 165 210 250 280 Locknut wrench size torque...

Страница 39: ...d the neutral adjusting screw D015 stationary while loosening the locknut D060 with a 13 mm wrench 5 Observe pressure gauges and if necessary turn adjusting screw D015 to reduce pressure differential...

Страница 40: ...ou must provide a 100 Hz PWM signal to the control solenoids If you perform this adjustment with the pump installed in a vehicle or machine safely elevate the wheels or disconnect the mechanism to all...

Страница 41: ...ttach a 600 bar 10 000 psi gauge to each system pressure port MA and MB 3 Remove servo cylinder locking screws E350 and plates E300 from both sides of the pump 4 Disconnect the control solenoids from...

Страница 42: ...on the M5 side in until the system pressure differential starts to decrease Continue turning the servo cylinder in until the system delta pressure results in no machine movement System delta pressure...

Страница 43: ...nation 6 Look at the hydraulic fluid for signs of system contamination oil discoloration foam in the oil sludge or metal particles 7 Before replacing the pump replace all filters and drain the hydraul...

Страница 44: ...enter of the control module when installing control Proper screen orientation P106 618E D084 D084 Incorrect screen orientation Correct screen orientation 3 If previously removed install orifices using...

Страница 45: ...ard the O ring 3 If necessary remove the coil using a 12 point 26 mm socket Inspect the machined surfaces on the control and top of the pump If you find any nicks or scratches replace the component 4...

Страница 46: ...and number the orifices for reinstallation 4 If screen D084 is clogged use a hook to remove retaining ring D098 and screen Remove and discard screen D084 5 Before removing the control note the positi...

Страница 47: ...ith neutral start switch MDC with neutral start switch and CCO F00T F00B F00P D692 D693 D750 D065 D250 D81 D80 D750 D065 D250 D81 D80 D250 D065 D750 D751 D751 D084 D098 Service Manual H1P 069 H1P 280...

Страница 48: ...k orifice 3 mm internal hex 2 5 Nm 1 8 lbf ft MDC Control Assembly Ensure you install dowel pins D300 in housing before installing control The pump will lose control causing a potentially hazardous si...

Страница 49: ...housing 8 Using a 4 mm internal hex wrench fasten sensor to control housing with screws D770 Torque screws to 1 85 N m 1 36 lbf ft 9 Position protection cover on control housing over sensor 10 Using...

Страница 50: ...250 3 Remove the control module and gasket D150 and discard the gasket 4 Install a new gasket D150 5 Ensure assembly fixture is positioned over the linkage spring in EDC center 6 Position the control...

Страница 51: ...owing torque sequence shown 1 2 3 6 5 4 Torque sequence 6 screw control D065 For proper neutral adjustment procedure refer to Control Neutral Adjustment on page 38 topic W Warning Calibration of senso...

Страница 52: ...1 7 mm x3 9 22 mm 45 deg 14 mm 3 Push down on plug and turn 45 degrees counterclockwise 4 Discard plugs Wax seals will be destroyed when the plugs are removed C Caution Do not damage the housing in t...

Страница 53: ...control and top of the pump If you find any nicks or scratches replace the component If pump has been rebuilt or a new control is being installed control software must be recalibrated Refer to H1 Aut...

Страница 54: ...lugs in and turn 45 degrees clockwise If control will continue to be under warranty install new sealing wax of a different color original wax is blue Pumps without sealing wax installed will not be wa...

Страница 55: ...arrier making note of seal orientation c Discard O ring on carrier and clean carrier for re use 4 Use a press or gear puller to press down on the shaft 5 Using a snap ring pliers remove the inner snap...

Страница 56: ...align it with the block and charge pump splines 7 Press down on the shaft and replace the inner snap ring J200 8 For 80 100 210 250 280 a Using a suitable press and tooling lubricate and install new...

Страница 57: ...5 using a 24 mm wrench 2 Remove the filter 3 Remove and discard the seal T045 and O ring T035 4 Inspect the plug and sealing surfaces in the filter bracket 5 Replace any damaged components 6 Install n...

Страница 58: ...nspect spring T030 for cracks or warpage and replace if necessary 9 Inspect sealing surface of filter adapter T010 for scratches or damage resurface or replace scratched or damaged part 10 Lubricate a...

Страница 59: ...mp coupling K200 6 Remove pressure balance plate S200 with seal S300 Discard seal S300 Note orientation of valve plate and seal 7 Remove charge pump coupling K200 8 Remove charge pump gear set S100 an...

Страница 60: ...ve valve plate S250 with seal S300 Discard seal S300 Note the orientation of valve plate and seal 8 Inspect carefully the valve and pressure balance plates for wear scratches or pits Scratches on thes...

Страница 61: ...6 7 8 Cover K550 Torque Sequence 1 2 3 5 4 6 P106 659E 11 Ensure proper torque on aux pad screws K400 and if necessary replace screws If charge pump replacement is necessary replace complete charge pu...

Страница 62: ...g surfaces of the pump for nicks or scratches 4 Lubricate and install the new seal V024 5 Install the charge pressure relief valve and torque to 52 N m 38 lbf ft 6 Operate vehicle machine through full...

Страница 63: ...m jelly 5 Replace pressure limiter valve and torque to the value in the table below Frame size Wrench size Torque 069 078 089 100 115 130 147 165 22 mm 70 N m 52 lbf ft 210 250 280 24 mm 70 N m 52 lbf...

Страница 64: ...ing bolt V020 Charge pressure adjusting screw V022 Charge pressure locking nut V010 Charge pressure cartridge L150 High pressure relief valve L150 High pressure relief valve Service Manual H1P 069 H1P...

Страница 65: ...e D015 Neutral adjust screw 4 mm internal hex NA D050 Coil mounting bolt 4 mm internal hex 8 N m 6 lbf ft D060 Neutral adjust locking nut 13 mm 10 N m 7 lbf ft D200 Swash plate feedback pin not shown...

Страница 66: ...ench size Torque B015 7 16 20 3 16 mm internal hex 12 N m 9 lbf ft B035 069 078 1 1 16 12 9 16 internal hex 70 N m 52 lbf ft B035 147 165 1 5 16 12 5 8 internal hex 150 N m 110 lbf ft D065 7 16 20 3 1...

Страница 67: ...nfoss Power Solutions US Company 2800 East 13th Street Ames IA 50010 USA Phone 1 515 239 6000 Danfoss Power Solutions Trading Shanghai Co Ltd Building 22 No 1000 Jin Hai Rd Jin Qiao Pudong New Distric...

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